Date: Fri, 13 Jun 2003 23:56:09 +0300 From: Ruslan Ermilov <ru@freebsd.org> To: Steve Francis <steve@expertcity.com> Cc: freebsd-net@freebsd.org Subject: Re: What are Interface errors in netstat? Message-ID: <20030613205609.GC29368@sunbay.com> In-Reply-To: <3EEA2AE5.6070109@expertcity.com> References: <3EEA2AE5.6070109@expertcity.com>
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[-- Attachment #1 --] On Fri, Jun 13, 2003 at 12:49:57PM -0700, Steve Francis wrote: > Can anyone explain what are interface errors in netstat -I? > > I assume they are CRC, undersize frames, etc. > Anyway to get details on which errors are occurring? > The interface input/output errors are incremented by the if_output routines. These are documented in the ifnet(9) manpage, as ifi_ierrors and ifi_oerrors, respectively. > Also, I'm now not sure that is what the error counter means - a box > doing about 20k pps normally runs with no reported interface errors - > however, when the application crashed, it got a spike of input interface > errors. > The nature of these errors is very interface specific, except for some common types like memory allocation failure, input/output queue full, etc. > The application crashing should not have affected MAC layer packets, so > do interface errors also include some TCP layer errors? > No. TCP layer errors are available thru "netstat -s -p tcp". Cheers, -- Ruslan Ermilov Sysadmin and DBA, ru@sunbay.com Sunbay Software Ltd, ru@FreeBSD.org FreeBSD committer [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+6jppUkv4P6juNwoRAiw1AJ9hk1w8tsOkyp3Io44NLAW8qOoFXgCeJtPR P9VPHuPi2xb8lUQEf16H1pI= =nozu -----END PGP SIGNATURE-----
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